Angel Island (saved as markangel.schematic) is an incredibly old town from 2011-2012. I don't know exactly when this was built as there isn't an accurate timestamp in the schematics, however other schematics go back to at least October 10, 2011. This was found in a folder containing some of the oldest server data known to still exist (most of the files have a last modified date of April 26, 2012, implying that the files were copied from somewhere).
Screenshots:
There is a sense of loneliness when exploring old schematics like this. A once fairly-populated city, now a ghost town.
